Markianos, Manolis Koutsis, Georgios Evangelopoulos, Maria-Eleftheria Mandellos, Dimitrios Karahalios, Georgios and Sfagos, Constantin, Relationship of CSF neurotransmitter metabolite levels to disease severity and disability in multiple sclerosis, Journal of Neurochemistry, (108), 158-164, 2009, Wiley, 0022-3042, 1471-4159